Screw bolt



FIG. 1 is a front view of the screw bolt;

FIG. 2 is a back view of the screw bolt shown in FIG. 1;

FIG. 3 is a plane view of the screw bolt shown in FIG. 1;

FIG. 4 is a bottom view of the screw bolt shown in FIG. 1;

FIG. 5 is a right side view of the screw bolt shown in FIG. 1;

FIG. 6 is a left side view of the screw bolt shown in FIG. 1; and,

FIG. 7 is a cross-sectional view along line 7-7 shown in FIG. 3. 

CLAIM The ornamental design for a screw bolt, as shown and described. 